3DMark
3DMark is the latest version of this hugely-popular synthetic benchmark. Making use of DX11 features such as tessellation, compute shaders and multi-threading, it provides modern-day results and is available as a free download.
Straight off the bat, the GTX 780 shows its Tesla-derived muscle with a very good showing in 3DMark. It's 35 per cent faster than a GTX 680 and over 20 per cent quicker than AMD's best single-GPU card.